Air quality index [µg/m3]:
excellent ≤ 20
good ≤ 60
lightly polluted ≤ 100
moderately polluted ≤ 140
heavily polluted ≤ 200
severely polluted > 200
PM 2.5
[µg/m3]
PM 10
HOUR OPOLSKA ST. ROOF (BEFORE FILTERS)  AIR SUPPLIED TO OFFICES
0400159heavily pollutedgood271excellent
0300162heavily pollutedgood291excellent
0200163heavily pollutedgood271excellent
0100168heavily pollutedgood271excellent
0000192heavily pollutedgood261excellent
2300170heavily pollutedgood231excellent
2200174heavily pollutedgood211excellent
2100174heavily pollutedgood221excellent
2000144heavily pollutedexcellent171excellent
1900117moderately pollutedexcellent141excellent
180059goodexcellent81excellent
170039goodexcellent61excellent
160036goodexcellent51excellent
150030goodexcellent51excellent
140024goodexcellent51excellent
130029goodexcellent61excellent
120036goodexcellent71excellent
110034goodexcellent61excellent
100034goodexcellent51excellent
090025goodexcellent41excellent
080032goodexcellent31excellent
070026goodexcellent21excellent
060023goodexcellent11excellent
050024goodexcellent11excellent